I remember that very layout like it was yesterday and can’t believe it was created 3 years ago. That layout proved that RW could build complex layouts and had grown up to become a serious tool. Sections continues to form the most important component of every site I build with RW and has done since I started using Sections. Huge credit to the Apple team too, for creating a design that would influence designs or many years to come. I think the layout works so well that the content becomes almost secondary.
Nothing else in the last 3 years in RW has even come close to doing what Sections even did 3 years ago. I often look at a site and think that the layout could be improved by using Sections to provide that all important proportional padding or vertical centring or proportional height with breakpoint control or positional overlay. Those are the building blocks that every web designer should have in their tool bag. Other Stacks developers can blatantly copy your stacks and ideas but nobody can copy Sections.
Sections easily gets my vote for the most significant contribution to RW Stacks ever. If I could not use Sections I would find it very difficult to go back to the old ways in RW.